{3(x-1)=y+5,y-1/3=x/5+1
问题描述:
{3(x-1)=y+5,y-1/3=x/5+1
答
{3(x-1)=y+5,(1)
y-1/3=x/5+1(2)
(1)整理得:3x-y=8;(3)
(2)整理得:3x-15y=-20(4)
(3)-(4)得:-y+15y=8+20;
14y=28;
y=2;
带入(3)得:3x-2=8;
3x=10;
x=10/3;
如果本题有什么不明白可以追问,